sctp: user perfect name for Delayed SACK Timer option

The option name of Delayed SACK Timer should be SCTP_DELAYED_SACK,
not SCTP_DELAYED_ACK.

Left SCTP_DELAYED_ACK be concomitant with SCTP_DELAYED_SACK,
for making compatibility with existing applications.

Reference:
8.1.19.  Get or Set Delayed SACK Timer (SCTP_DELAYED_SACK)
（http://tools.ietf.org/html/draft-ietf-tsvwg-sctpsocket-25)

Signed-off-by: Shan Wei <shanwei@cn.fujitsu.com>
Acked-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Acked-by: Vlad Yasevich <vladislav.yasevich@hp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

2 files changed, 3 insertions, 2 deletions

diff --git a/include/net/sctp/user.h b/include/net/sctp/user.h
index 2b2769c5ca9f..92eedc091517 100644
--- a/include/net/sctp/user.h
+++ b/include/net/sctp/user.h
@@ -78,6 +78,7 @@ typedef __s32 sctp_assoc_t;
 #define SCTP_GET_PEER_ADDR_INFO 15
 #define SCTP_DELAYED_ACK_TIME   16
 #define SCTP_DELAYED_ACK SCTP_DELAYED_ACK_TIME
+#define SCTP_DELAYED_SACK SCTP_DELAYED_ACK_TIME
 #define SCTP_CONTEXT    17
 #define SCTP_FRAGMENT_INTERLEAVE        18
 #define SCTP_PARTIAL_DELIVERY_POINT     19 /* Set/Get partial delivery point */
diff --git a/net/sctp/socket.c b/net/sctp/socket.c
index a09b0dd25f50..8e02550ff3e8 100644
--- a/net/sctp/socket.c
+++ b/net/sctp/socket.c
@@ -3428,7 +3428,7 @@ SCTP_STATIC int sctp_setsockopt(struct sock *sk, int level, int optname,
                 retval = sctp_setsockopt_peer_addr_params(sk, optval, optlen);
                 break;
 
-        case SCTP_DELAYED_ACK:
+        case SCTP_DELAYED_SACK:
                 retval = sctp_setsockopt_delayed_ack(sk, optval, optlen);
                 break;
         case SCTP_PARTIAL_DELIVERY_POINT:
@@ -5333,7 +5333,7 @@ SCTP_STATIC int sctp_getsockopt(struct sock *sk, int level, int optname,
                 retval = sctp_getsockopt_peer_addr_params(sk, len, optval,
                                                           optlen);
                 break;
-        case SCTP_DELAYED_ACK:
+        case SCTP_DELAYED_SACK:
                 retval = sctp_getsockopt_delayed_ack(sk, len, optval,
                                                           optlen);
                 break;